Then what is the root user’s user root?

Think you're clever? Thought you might trick me with your question, huh? I bet you’ve been thinking about it all week, haha. So here we go again, if you’d read the previous post, you might even know it by know: it’s in /root. This directory behaves for the root user just like /home/beofulf would behave for the user beowulf, or /home/<username> would for any user called the same name. basically, when you log in as root, ~ will bring you to /root, you will start from /root, all the root user’s files and documents, if root would have any (which would make little sense) would be in /root.

This way the root user has a user root. Because Linux likes a good wordplay too.